Mahant Mehak, Anand Arun, Sangwan Vandana, Mohindroo Jitender
PhD Candidate, Department of Veterinary Surgery and Radiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India.
Department of Veterinary Surgery and Radiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India.
Vet Res Forum. 2023;14(9):465-470. doi: 10.30466/vrf.2023.553398.3464. Epub 2023 Sep 15.
The aim of this study was to investigate the relationship of different radiographic parameters of mandibular first molar with respect to age, body weight and breed in healthy dogs. Overall, 50 dogs with the age from 5 to 156 months and body weight from 6.00 to 45.00 kg of various breeds were made the subject of study. Animals were categorized into different groups based on age, body weight and breed. A new dental parameters measurement technique was standardised which was in line with modified Lind's measurement technique of human dentistry. A significant decrease in least square count means of dental parameters was observed in age group 1 (0 - 12 months) in comparison with group 2 (13 - 60 months) and group 3 (> 60 months). A significant decrease in least square count means of dental parameters was observed in group A (0.00 - 10.00 kg) in comparison with group B (11.00 - 25.00 kg) and group C (> 25.00 kg). The root canal width showed a significant decrease with an increase in age; therefore, it was difficult to approach pulp cavity in older dogs. Small breeds showed decline in root length/crown height (R/C) ratio and mandible height/first mandibular molar height (MH/M1H) ratio in comparison with medium and large breeds because of which there were more chances of tooth loosening in smaller breeds. Regression equations formulated with respect to body weight and age can act as a ready reference to calculate values of different dental parameters at places where dental radiography is not available.
本研究的目的是调查健康犬下颌第一磨牙不同影像学参数与年龄、体重和品种之间的关系。总体而言，选取了50只年龄在5至156个月、体重在6.00至45.00 kg之间的不同品种犬作为研究对象。根据年龄、体重和品种将动物分为不同组。标准化了一种新的牙齿参数测量技术，该技术与人类牙科改良的林德测量技术一致。与第2组（13 - 60个月）和第3组（> 60个月）相比，第1组（0 - 12个月）的牙齿参数最小二乘计数平均值显著降低。与B组（11.00 - 25.00 kg）和C组（> 25.00 kg）相比，A组（0.00 - 10.00 kg）的牙齿参数最小二乘计数平均值显著降低。根管宽度随年龄增加而显著减小；因此，老龄犬进入牙髓腔较为困难。与中型和大型犬相比，小型犬的根长/冠高（R/C）比和下颌高度/第一下颌磨牙高度（MH/M1H）比下降，这使得小型犬牙齿松动的可能性更大。根据体重和年龄制定的回归方程可作为在无法进行牙科X线摄影的地方计算不同牙齿参数值的现成参考。
